Internal combustion engine



Nov. 10, 1931. N. c. HOCH `1,831,664

INTERNAL COMBUSTION ENGINE Filed Aug. 6. 1930 Y4 Sheets-Sheet i R9 z' M J M akamu! Norma# /Hoci,

Nov. l0, 1931. N. c. HocH 1,831,664

INTERNAL COMBUSTION ENGINE Filed Aug. 6, 1930 4 Sheets-Sheet 2 gWnto/o Nov. 10, 1931. N, Q HQCH .l 1 1,831,664

INTERNAL COMBUSTI ON ENGINE Nov. 1o, 1931. "v N c, HOCH 1,831,664

INTERNAL COMBUSTION ENGINE Filed Aug. 6. 1950 4 Sheets-Sheet 4 f1 0 26 1f 6 W y V af j A 'f3 3! 5 a5 f ff 55 9 l0 25 I6 z5 z3 in 5 Z3 i f/f 15 /a M n 25 f? 24 37 ff 16,15 f/h/ i ff l Il; v| O g# L93 y Z5 "51 y f4 2y f zg 3 55 Z3' g 51 gwwmtbo Norma/z Eran/;

a@ www Patented Nov. 10, 1931 Laster-i.

PAT-ENT ori-ICE NORMAN c. HocH, or HUNTINGDON, PENNSYLVANIA Y Y INTERNAL coMBUsTiIoN ENGINE. l'

` Ymutation :nea` August e, i930. 'serial 1ra-173,414.1 Y

The invention relates to internal combustion engines and has for its principal object the provision of an engine that is particularly adapted for driving an aeroplane propeller but capable for usein'driving other machinery, and of a type `in which theengine cylinders are arranged radially of the crank shaft and provided with oppositely disposed pistons, the motor being of two-cycle type and having means provided for compressing the combustible mixture and vdelivering it to,

the cylinders in compressed condition 4for expansion therein preliminary to compression by the engine pistons to, form a combustible mixture Y A further object of the invention is'fthe provision of means for compressing the mixture for introduction to the engine cylinders, said means being actuated by thev crank shaft of the engine.

The invention will be described in detail hereinafter and will be found illustrated in the accompanying drawings, in whichv Figure 1 is a side view of the engine showing it applied for driving an aeroplane propeller, the propeller being shown fragmentarily and in broken lines, Y l

Figure 2 is a View in elevationy of the engine with the front plate of theicasing shown in Figure 1 remove Figure 3 is a similar'view with thefrear plate of the casing removed,

Figure 4 is a sectional View on a' plane indicated by the line 4 4 of Figure 2,

Figure 5 is a sectional view on a plane indicated by the line 5--5 of Figure 4, and

Figure 6 is a sectional view on a plane inp dicated by the line 6-6 of Figure 2.

In the drawings similar reference characters are used to designate corresponding parts in all the views.

The engine or motor is enclosed within a casing comprising a cylindrical member 1, to which is secured a conical front plate 2, and a rear plate 3, 4 designating the shaft of the engine on which may be mounted a propeller or other means for utilizing the power of the engine.

Arranged around the crank shaft 4'are engine cylinders 6,7, 8 and 9. the number off und cylinders selected for illustration being four, but it will be apparent that any number of cylinders `maybeprovided and the invention is therefore not limited to the number of cylind'ers shown. The cylinders have both ends open and are secured to inwardly offset portions 10 bordering openings in thecylindrical memberl, and are also secured or formed integral with a central casing 11 providing the crank oase of the engine. In each of the cylindersl there is provided two pistons designated'12 A`and 13, said pistons being arrangedl to reciprocate in opposite directions from one another sothat when the explosive charge in the cylinder is compressed, the pistons will be in the positions shown in Figure 5 'inthe-cylinder 6, and-the ignition devices,'indicated by the spark plugs 14 are therefore4 arranged intermediate of the ends ofthe cylinders for detonating the charge when compressed. The pistons 13 are operatively connectedv with a crank 15 arranged within the crank casing llvby means of piston rods 16. Pistons 12 have eacha piston rod 171`connecting kit with a cross head 18 to the end of which are secured rods 19 slidablyV mounted inguides 20, and are connected by'means of links 21 with other cranks 22 on the crank shaft 4 arranged on the outer side of the crank case 11, and diametrically opposite to the crank 15 within the crank case 'heretofore described this structure providt heretofore referred to.

Each of lthe engine cylinders is provided with intake ports `23adj acent to its two ends,

and exhaust port 24, preferably arranged on and to discharge the exhausted products e Y therefrom. It'will be noted that the exhaust ports 24 are inwardly of themiddle portion of the cylinder in each instance from the intake ports, this arrangement of the ports permitting f discharge of the exhaust products c er compression as result of the explosion in each of the cylinders before' the intake ports are exposed by the movement' of the pistons when in the position shown in Figure 5, cylinder 9, and the pistons 12 and 13 are provided with ballies that direct the incoming combustible mixture from the ports 23 toward the middle of the vcylinder and thereby prevent the incoming mixtureffrom being forced outwardly through the' exhaust ort-s 24, and in fact this direction of the combustible mixture assists inorcingtheexhaust products to the exhaust ports preliminary to the closing of the ports' andcompression of the combustible mixtnrewhenthe pis-y tons assume the positiony shovvn in F i'gure'b, lCylinder S, ood tho.oxoromaoororressoo Position as shovvnby cylinder 6 in saidiigurez,

,The Combustible n, .Xt-.oro.o1.tlo,fsoolo Cylinders iscomproseod `insoleerlebe.oo oorl;osi: sion cylinders, one of lthese. compression acyl:-V inders being provided `for Veach of the Jengine cylinders, *andV for kthe engine Jylinders 6, 7 and 9, there is provided a,compressioncyl.- inder designated 26, 27,28, and, 2,9, respe;y tivoly- The oonstrootoo and, operation the several compressed cylinders areidentical and description oit oneof t l1ein, v\"ill,ber suifli;y oont to understand the ooostrootioo .of tho, others. designates an intake,,forl Combustible mXturo that may .bo oooooetollto o Carburetor or other Supply. .of o- Combustible, mixture,L and having langes.31,tl1er efroin leading tothe several compressionlcylinders in which .is provided e. .velrofoasogf@Shop the Combustible mxtureiototllo.oylofloreed a valve 34 controlling the,,supplyoftheMcom;l bustible mixture from thel compressignylin, dei` through a manifold3.5 connectedto the t intake ports23. 3,6 yindiopates,veqmpression pistons in the compression Cylinders Seid Pier tooo boing ooooootod for sirooloooonsgeoro: ment by a Connecting. rod. 3 8. '.odisetoe pitman pivotally ,secured to `,theicinnecting rod 37 asshownatw, and vooooo.brioellnnoe: nected to gear wheel 40, that is, geared tothe gear Wheel 4l securedt :the shaft 4,; 4,152

cates another gearivheelalso gearedto v vheel 41 that operates the pistons u36i1,1`thel cylinders 2T and 29 lof/.means o aoronl son ,thoshoft' f necting with ,theA4 exhaust port'sv24 in there- Spootve cylinders-` e s: It will be apparent `that.thoJP/,ns1leistete Wllbe So arranged and..tinodthatwhoostho be moved outwardly as shown by the position of the pistons in cylinder 7, such movement of the pistons being vthe expansion stroke of the engine. YWhen vthe pistons reach the position immediately before the position as shown in oylinder, the exhaustdtakes place through the eXhaustQp'orts24 and intake is immediate thereafter' exposed so that the com- 'pressed products of combustion in the com'- jpression cylinder connected with the engine cylinder will be admitted to the intake portsl 23,'V and vvheiI-tlie pistons are returned towards the niiddleof the cylinder for the compressionstrok'e andthe ports 23 and 24 are notosnosotllootnoon the vpistons thonfooluots iat each l,

oe'olflo ooaeieeloeloyioe-.foor .ovlindors as elio-Woao-thof @famose povosoroood by the, enginesulostootollv keolien?olot' to on eig itpylinderkeun "in of the four cy'cletype.l

vWhatis claiine I s. 4) sin* n i 'inf' .Y Aotlaoroeloomlioseoeoosieeooloprlsme last mentioned pistpns'and ,theyalvesl V l. t

In testimony Whelolaefx mv signature'.

NORll/IN C'. HOCH.

pistonsare in thoposton Shono-egero 5, cylinder 6 the,y explosion,ietlleoxploson chamber will take place and the pistons Wil izo 

